[whalesalad]

Aside from spinning up an EC2 node in each AZ and doing ping or tracing tests I wonder if there is a quick-n-dirty way to map AZ’s between different AWS accounts. I’ve never had to approach that scenario (cross account, low latency requirements) but in the future I’ll keep this in mind.

[cthalupa]

Go to your Subnets tab in the EC2 console. You'll see the actual AZ numbers there, vs. the 'random' lettering.